Window lock structure



' Aug. 2l, 1934. J. H. HENDRIX WINDOW LOCK STRUCTURE Filed July'BO, 1932 Patented Aug. 2l, 1934i` riso stars WINDOW LOCK STRUCTURE Joel Henry Hendrix, New Castle, Pa; Application .luly 30, 1932, Serial No. 626,893

8 Claims.

rack and bolt means associatedtherewith operable.

to' secure said lock at any desiredpoint withv respect to said rack. v

Another object of this invention is the provi'- sion of a'lock structure oi this character more especially adapted for cooperation with a rack, and comprising' a movable bolt' and a pair of bolt supporting cam latch jaws-associated therewith,

5 said jaws and bolt being yieldably movable as a unit to permit the locli to' travel over said rack, 'said bolt being additionally movable with respect to said jaws to locked and unlocked positions.-

A further object of this invention is the-*provilsion'ofa lockof this character applicable towindows: and the like comprising` a nested jaw and bolt structure mountedl and' movable as. a=-unit adapted to automatically engage a selected notch or slot in a rack' tomaint'ainrthe window' at such point, but yieldingly'operable' uponmanua-l movement' oi-'t'lieI window to retractedv position, said" bolt' being; independently movable: with respect to.

become apparent as the description-proce'eds, the;

invention resides in-theconst'ruction; combination and arrangement of parts; liereinaftermore fully described: and claimed, and" illustrated" in"- the ace companying drawing, in which-like charactersA of referenceindicate like par-tsV throughout the' sev-y eral'-figures; ofwhich: y

Fig. 1 is a fragmentary front elevation'i. offA a; window structure' with parts broken awayfshowVd ing'the bolt/in locking position;

Fig'. 2 isla side elevation' Withtthe cover platev removed and showmgthebolt in extendediposi'ytion;`

Fig. 3 is similar to Fig. 2with' the bolt'i'nrieltracted' orunlocked position;

Fig. 4- isaz crosssectiontalen"on'theline 4--4` ofy Fig. 2;

Fig. 54 is detail perspective* View of" the bolt trigger'member;

Fig. 6 is a fragmentary-perspective View oi-L the key; and

Fig. 7- is a' fragmentary perspectiveview of the 55 rack' member.

(Cl. 'l0-29) The devices of v this general character with which I am familiar have proven deficient?, by reason of complex arrangement, costly construction, inability to automatically assume operative and inoperative Window sash supporting posi'n 60 tions'by manual movement of thesash'in either direction, nonprcvision` ot means for locking the' sash at any desired point within its range ofmovement; and in lieu o1TA the oord andlweights now prevalent, and it was'toovercome suchdecienoies by providinga lock structure aulaptedi t'o-cooperate with a lixed rack Jtoinaintain thewindow sash at anydesired point'L without the' aidof. sash weights; if desired; comprisinga yiel'd.

able normally extended latchzcam*jawandlocke 7n" ingbolt. structure adapted to; selectively engage" complemental notch openings in the rack andbe disengaged therefrom" by' manualv movement. of" thesash, said jaws and bolt beng'normallymovableas a unit, saidbolt being; additionally" movable; with` respect to' said jaws: to locking'h and" unlocking positions, byr a key .operable in; one direction; that* I designed the device' formingv theA subj eotmatter 'of this invention.

In' the' illustrated embodiment" ci'oaracterizing4` 80" this'invention there isshowna,` lockstructure A",L rack B, windowframe C; andmovable window; sash. D.

'Ihe lock'A comprises acasingincludin'g'side section 1; top. and bottom sectionsZ' and 3; re'-v speot'ivelv,v rear wall section. 4; removable side. section 5 constituting a cover, andendiiace plate 6 terminating at its' ends in Vprojections 7? and4 at itsv side edges in lateral an'ges 8.' extending' beyond the sidesV 1 and. 5. The tace plateji's 90 formed' withv a central opening; 9` and within"- wardlyprojecting lugs. l0 formingcontinuatons of the'top and' bottomendwalls ofsaidop'ening to form", guide seats for one end of the' latchv jaw,-V andl bolt mechanism' E slidably mounted in. said' opening. Theother'end of said'mechanism is similarly mounted. between .the spaced. lugs. 11vx formedv on rearwall section 4in alignment with` lugs 10. Oneof said lugs 1l is*formed-with` arr enlarged portion' 12 formed withathreadedopen- 100 ing 13 and terminating i'na fulcrum' point `11i'- for a purpose hereinafter more fully appearing.

The latch jaw mechanism E slidably mounted between the lugs 10-11 includes the'latch bar l5- substantially rectangular in1 general contour T05 formed? at? one end with the thickened spaced" latch jaws 16 and 17 having inclinedopp'ositely extending cam faces 18. Jaw member 11'A is formed withl a depending stop-lug" 19 adapted to engageI lug 10-` andV limit' the forward movement of said bar 15. The lower edge of said bar 15 is formed with a cut out portion 20 extending to a point substantially central thereof and a cut out portion 21 intermediate said jaws for purposes directly more fully appearing. The other end of said bar 15 adjacent its corners is formed with thickened portions 22 similar in thickness and spaced relation to jaws 16 and 17, forming seat 23 extending between the respective jaws and portions 22, the free ends of the latter being slidably engageable with the respective guide lugs 11 as will be clear without further description.

A lock bolt 24 is positioned on'said seat 23 slidable with respect to latch bar y15, and is formed at one end with a thick head portion v25 forming on each side of the bclt a shoulder 26. One surface of said head extends in cut out portion 21, the shoulder 26 limiting the movement of said bolt 24 in unlocking direction, and stop lug 27 formed on one edge of said bclt and engageable with jaw 16 limits the movement of said boltin locking direction. Said bolt is formed at its rear end with a raised portion 28' and spaced therefrom is a lateral iinger 29 formed with a cam surface 30 and adjacent thereto the edge of said bolt is cut out as at 3l for a puripose hereinafter appearing.

Spaced inwardly from portion 28 is lug 32 on which one end of trigger member 33 is rotatably mounted.v Said trigger is formed on one edge spaced from its free end with a lateral projection 34 terminating in agstop lug 35 adapted to limit the movement of said member in one direction, and is formed on its opposite edge with lug 36 engagable with the edge 37 of jaw l7 to nor'- mally maintain bolt 24 in retracted position as will hereinafter more fully appear.

Mechanism E mounted as above described is normally maintaining in extended position by spring 38 threaded over the spaced lugs 39 of raised portion 40 formed on the inner surface of side 1, and under knob 41 formed on the inner surface of top section 2 intermediate said lugs 39, which tends to exert a spreading force on spring 40, one end of which engages lug 34 and the other engages fulcrum point 14 and behind lug 42 formed on latch bar 15.

Suitably located in the side 1 intermediate the lowermost lugs 10 and 1l` 'is' a key receiving opening 44 corresponding to the configuration of ward portion 45 of key 46. WhenV the bolt 24 is in retracted position, as shown in Fig. 3, operation of key 46 to the right causes ward or bit45 to engage and lift trigger 33 disengaging lug 36 from seat 37, and spring 38 seating against lug 34 moves bolt 24 to vextended or locked position as shown in Fig. 2. Further movement of ward 45 in the same direction causes it to engage cam surface 30 of finger 29 retracting bolt'24 until lug 36 again engages seat 37 under the action of spring 38 maintaining" the bolt in such retracted position, and whereupon mechanism E may be retractively controlled-as a unit byV spring 38 acting on lugs 34 and 14 as and for a purpose hereinafter more fully appearing.

l The side or cover 5 is formed with a similar opening or key hole 44 and is secured to the casing byrsuitable screws engaging threaded opening 47 in lug 48 formed on bottom section 3, and similar opening 13 in portion 12, as will be clear without further discussion.

The lock A is adapted to be embedded in a window sash frame or the likein a manner well knownlto the artasshown in dotted Outlines in Fig. 1, and in position for coacting engagement with rack B now to be described.

Rack B is adapted to be suitably secured by screws or otherwise to or embedded in one surface of window frame C so that surface 49 will slidably contact the contiguous surface of the sash D and face plate 6 embedded therein, and is formed with a plurality of spaced slots or notch openings 50 corresponding in configuration to the bolt head 25 and havingY horizontal walls 51, the end walls inclining upwardly therefrom to form the bevel or cam surface 52 corresponding to the complemental cam surface 18 of the latch jaws 16-17 of the bar l5 which they are adapted to contactingly engage when said bar is in extended position, as clearly shown in Fig. 1 of the drawing.

While the key controlled operation of the bolt 24 is thought to be clear from the above description, it might be well to further describe the operation of the latch mechanism E.

As above shown, when the bolt 24 is locked in retracted position a unitary slidable latch structure is eifected. 1 Normally such structure is maintained in extended position in engagement with a desired notch 50, the force of the combined spring and the coacting engagement of the complemental cam faces of the jaws and rack being sufficient to maintain the window sash at any desired point within its range of movement, said cam construction adapted to effect retraction of said latch structure from said notch or notches upon manual force being applied to said sash in either direction and automatically engaging the next or desired notch to hold the window sash as in the rst instance. All that is necessary to lock the sash in such position is to insert and turn the key 46 operating ward 45 to lift trigger 33 releasing bolt 24 which is projected into locking engagement with its keeper or rack by the additional action of the spring and which in conjunction with jaws 16-17 effects a rigid locking bolt unit effectually locking the sash against movement in either direction or in closed position as will be apparent without further explanation.

While I have preferably shown the lock as applied to the sash, it will be understood that the parts may be reversed, that is, the lock mounted in the frame according to the exigencies of the particular requirements without departing from the principles of the invention.

It will be apparent from the foregoing that I have provided a simple and unique lock structure, easily installable, manufacturable at a minimum of cost, and efficient for the purposes intended.

Although in practice I have found that the form of my invention illustrated in the accompanying drawing and referred to in the above description as the preferred embodiment is the most efficient and practical; yet realizing the conditions concurrent with the adoption of my invention will necessarily Vary, I desire to emphasize that various minor changes in details of construction, proportion and arrangement of parts, may be resorted to within the scope of the appended claims without departing from or sacrificing any of the principles of this invention. i

Having thus described my invention, what I desire protected by Letters Patent is as set forth in the following claims: i

1. A lock comprising a slidable latch jaw structure, a bolt slidable with said jaw structure but susceptible of `independent movement with respect thereto, a trigger member associated with the bolt normallymaintaining the bolt in fixed position with respect to said latch jaws, said trigger and bolt being adapted to be moved to locked and unlocked positions by a key.

2. A lock comprising a slidable latch jaw structure, a retractile bolt slidable with the latch jaw structure but susceptible of independent movement with respect thereto, a trigger carried by the bolt engagea-ble with the latch jaw structure, means normally holding the trigger in engagement with the latch jaw structure and operm able upon disengagement of the trigger to move the bolt to extended position, said trigger adapted to be tripped and said bolt retracted by a key.

3. A lock comprising a slidable latch bar including spaced jaws, a bolt movable as a unit with the latch jaws but susceptible of independent movement with respect thereto to locked and unlocked positions, trigger means associated with said bolt, said trigger and bolt adapted to be operated by a key operable in a single direction to trip the trigger and retract the bolt.

4. A lock for windows and the like comprising a retractile latch element including a cam jaw means normally in window supporting engagement with a keeper, and automatically retractible from such engagement upon movement of the Window in either direction, slidable bolt means associated with said jaw means, adaptedA upon movement of the window in either direction, a slidable bolt associated with said latch jaws, a trigger member carried by said bolt, and means coacting with said trigger to normally maintain the bolt in unlocked position but operable to lock said latch jaws in fixed engagement with said rack.

6. A lock for windows and the like adapted for engagement with a rack comprising integrally connected slidable latch jaws including a bolt normally movable as a unit with said latch jaws, yieldable means normally maintaining the latch jaws in engagement with said rack, and cam means carried by said latch jaws to effect retraction thereof upon force being applied to said Window in either direction.

'7. A lock for windows and the like adapted for engagement with a rack comprising slidable latch jaws, spring means normally maintaining the latch jaws in extended position, a retractile bolt slidable with the latch jaws but susceptible of independent movement with respect thereto, a trigger connected to said bolt normally maintaining the same in retracted position, said spring additionally holding the trigger in bolt retracting position and acting upon releasement of the trigger to move the bolt to locking position.

8. A lock comprising a slidable latch bar including spaced latch jaws, a latch bolt slidably carried by the bar and normally constituting with said jaws a slidable latch unit but susceptible o independent movement with respect to said jaws, a trigger carried by said bolt, yieldable means normally holding said trigger in bolt retracted position but operable upon release of said trigger to move the bolt to extended position.

JOEL HENRY HENDRIX. 

